How do I tell the rating of my clutch + flywheel. Need to know how much power and torque it can take. Ford Focus mk3 1.6 turbo petrol.

Planning to do a remap but not to squeeze as much power as possible, rather to make it more efficient around town. To be honest, I wouldn’t want more power, if I could, I would just keep it the same but if they could make it more efficient would be great. Currently getting 21mpg around city, London. If I could get 29 or 30. Would be happy.